ComfyUI-LLM-Embeder

Local LLM chat nodes for ComfyUI, with a clean handoff path to downstream prompt optimization.

Features

• Multi-turn chat with Ollama /api/chat
• Optional Hugging Face Inference API support via LLM Config
• OpenAI-compatible chat support (OpenAI / DeepSeek / Qwen) via custom base_url
• Anthropic Claude support via custom base_url
• Session memory by session_id (in-memory only)
• Optional system_prompt
• Scrollable history in a modal viewer
• deliver_to_optimizer action outputs the latest assistant reply only
• Auto-clear input after send (toggle)

Nodes

Chat (Ollama)

Inputs:

• model_name: model id (Ollama or HF, depending on provider)
• base_url: Ollama base URL (ignored when provider is huggingface)
• user_message: user input text
• action: send / regenerate / clear / deliver_to_optimizer
• session_id: conversation id
• system_prompt: system message
• refresh_session: reset history for the session id
• auto_clear_input: clear input after a successful send
• llm_config: optional config from LLM Config node

Outputs:

• assistant_response: only non-empty when action=deliver_to_optimizer
• readable_history: full readable transcript

Behavior:

• send: appends user input, calls the provider, updates history
• regenerate: drops the last assistant turn, calls the provider again
• clear: resets history (keeps system prompt if set)
• deliver_to_optimizer: does not call the provider; returns the latest assistant reply from history

LLM Config

Outputs a LLM_CONFIG struct that can be shared across Chat nodes.

Fields:

• provider: ollama, huggingface, openai, deepseek, qwen, claude
• base_url: provider base URL (see sections below)
• model_name: model name or model id (provider specific)
• temperature
• top_p
• max_new_tokens
• hf_token: Hugging Face API token (recommended)
• hf_api_url: optional override for Hugging Face Inference API endpoint
• api_key: API key for OpenAI-compatible or Anthropic providers

Chat History Viewer

Shows readable_history and provides an "Open History" modal for full scroll.

Hugging Face Inference API

When provider=huggingface, the Chat node will call: https://api-inference.huggingface.co/models/{model_name}

Notes:

• Many public models still require an HF token.
• Chat history is converted into a single prompt before the API call.

OpenAI-Compatible API (OpenAI / DeepSeek / Qwen)

When provider=openai|deepseek|qwen, the Chat node will call: {base_url}/chat/completions

Notes:

• Use an OpenAI-compatible base URL for your provider.
• Set api_key in LLM Config.
• model_name should be the provider's model id.

Anthropic Claude API

When provider=claude, the Chat node will call: {base_url}/v1/messages

Notes:

• Use an Anthropic-compatible base URL.
• Set api_key in LLM Config.

Install

1. Place this folder under ComfyUI/custom_nodes/
2. Restart ComfyUI
3. Add nodes:
   • Chat (Ollama)
   • LLM Config
   • Chat History Viewer

Usage

1. Create Chat (Ollama) and set base_url / model_name
2. (Optional) Add LLM Config to select provider and set api_key
3. Set action=send, click Execute to chat
4. When satisfied, set action=deliver_to_optimizer and Execute
5. Use assistant_response output to feed your optimizer node

Screenshot

Example graph: LLM Config drives Chat (Ollama) via llm_config, and outputs route to a text node plus Chat History Viewer for full history review.

Example Workflow

Drag this image into ComfyUI to load and run the workflow.

API

Frontend calls POST /chat_optimize/chat and receives:

• assistant_response
• readable_history

Notes

• History is in memory only; refresh or restart clears it.
• assistant_response is empty for all actions except deliver_to_optimizer.
• If new fields do not appear, restart ComfyUI and re-add the node.

Contact

For questions or collaboration, email: [email protected].

License

MIT. See LICENSE.